249972319 has 2 divisors, whose sum is σ = 249972320. Its totient is φ = 249972318.

The previous prime is 249972299. The next prime is 249972323. The reversal of 249972319 is 913279942.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249972319 - 2⁹ = 249971807 is a prime.

It is a super-2 number, since 2×249972319² = 124972320532475522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249972719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124986159 + 124986160.

It is an arithmetic number, because the mean of its divisors is an integer number (124986160).

Almost surely, 2^249972319 is an apocalyptic number.

249972319 is a deficient number, since it is larger than the sum of its proper divisors (1).

249972319 is an equidigital number, since it uses as much as digits as its factorization.

249972319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 249972319 is about 15810.5129265309. The cubic root of 249972319 is about 629.9372735062.

The spelling of 249972319 in words is "two hundred forty-nine million, nine hundred seventy-two thousand, three hundred nineteen".